JPS5549716A - Speed adjustment unit - Google Patents

Speed adjustment unit

Info

Publication number
JPS5549716A
JPS5549716A JP12153878A JP12153878A JPS5549716A JP S5549716 A JPS5549716 A JP S5549716A JP 12153878 A JP12153878 A JP 12153878A JP 12153878 A JP12153878 A JP 12153878A JP S5549716 A JPS5549716 A JP S5549716A
Authority
JP
Japan
Prior art keywords
speed
frequency
speed adjustment
adjustment
signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12153878A
Other languages
Japanese (ja)
Inventor
Tadashi Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12153878A priority Critical patent/JPS5549716A/en
Publication of JPS5549716A publication Critical patent/JPS5549716A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Velocity Or Acceleration (AREA)

Abstract

PURPOSE: To make the adjustment of a playing speed possible under a state phasing a crystal oscillation frequency without a local oscillator by dividing directly the reference frequency to take out speed signals in the playing speed adjustment unit of acoustic apparatus.
CONSTITUTION: The output reference frequency of crystal oscillator 2 is divided by variable frequency divider 14, and optimum frequency division ratio n calculated by frequency division ratio operation circuit 15 is set to obtain reference speed signals for phasesynhronization of the rotation of a motor. T-type FF16 makes the pulse width of reference speed signals of the 1/2 period accurately. The output of frequency generator 12 is inputted to phase comparator circuit 8 together with the reference speed, and the output becomes input signals of motor driving circuit 10. In this case, on local oscillator is used in the synchronization system, so that a fixed- width speed adjustment and a speed adjustment dependent upon the scale are possible, and a speed adjustment in an arbitrary width is possible.
COPYRIGHT: (C)1980,JPO&Japio
JP12153878A 1978-10-04 1978-10-04 Speed adjustment unit Pending JPS5549716A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12153878A JPS5549716A (en) 1978-10-04 1978-10-04 Speed adjustment unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12153878A JPS5549716A (en) 1978-10-04 1978-10-04 Speed adjustment unit

Publications (1)

Publication Number Publication Date
JPS5549716A true JPS5549716A (en) 1980-04-10

Family

ID=14813716

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12153878A Pending JPS5549716A (en) 1978-10-04 1978-10-04 Speed adjustment unit

Country Status (1)

Country Link
JP (1) JPS5549716A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS494119A (en) * 1972-05-02 1974-01-14
JPS5025988A (en) * 1973-07-09 1975-03-18
JPS5079246A (en) * 1973-11-12 1975-06-27

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS494119A (en) * 1972-05-02 1974-01-14
JPS5025988A (en) * 1973-07-09 1975-03-18
JPS5079246A (en) * 1973-11-12 1975-06-27

Similar Documents

Publication Publication Date Title
JPS5592587A (en) Synchronizing system for motor revolving at low speed
JPS5549716A (en) Speed adjustment unit
JPS56157291A (en) Control system for motor
JPS55112008A (en) Low frequency clock formation circuit
JPS5333038A (en) Phase synchronizing oscillator
JPS5378725A (en) Process circuit for color video signal
JPS52151819A (en) Inverter device connected in parallel
SU582575A1 (en) Device for adjusting original phase in combined phasing systems
JPS5566295A (en) Apparatus for controlling rotating phase of motor
JPS5787241A (en) Phase synchronizing circuit for optional frequency conversion
JPS54720A (en) Motor controller
MY8100152A (en) Elektronik timepiece
JPS53141555A (en) Automatic frequency regulator of oscillator circcuit for crystal vibrator
JPS55127735A (en) Phase synchronizing oscillator
JPS57208882A (en) Speed controlling circuit for motor
JPS5493955A (en) Ignition pulse phase control method
JPS5661833A (en) Phase synchronous oscillating circuit
JPS542646A (en) Generation system for variable-frequency signal
JPS5610086A (en) Speed controlling device
JPS54144135A (en) Xy plotter control method of digital type
JPS5362576A (en) Frequency counting device
JPS5597708A (en) Frequency converter
JPS5688688A (en) Motor speed changing apparatus utilizing frequency division of fg output
JPS54136110A (en) Phase synchronous type low frequency mixer circuit
JPS5523474A (en) Rotary detector